Spectral Transmission Factor Calculator

✖Transmitted Spectral Emission at a wave length λ.ⓘ Transmitted Spectral Emission [J_λ']			+10% -10%
✖Spectral Irradiation also known as spectral power density or spectral radiant flux, It describes the distribution of radiant power emitted by a source across the electromagnetic spectrum.ⓘ Spectral Irradiation [G_λ]			+10% -10%

✖Spectral Transmission Factor an instrument used to determine the relative intensity of various wavelengths in a spectrum of light.ⓘ Spectral Transmission Factor [T_λ]

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Formula

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Spectral Transmission Factor

Formula

`"T"_{"λ"} = ("J"_{"λ"}"'")/"G"_{" λ"}`

Example

`"1.127536"="3.89"/"3.45"`

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Spectral Transmission Factor Solution

STEP 0: Pre-Calculation Summary

Formula Used

Spectral Transmission Factor = Transmitted Spectral Emission/Spectral Irradiation
T_λ = J_λ'/G_λ
This formula uses 3 Variables

Variables Used

Spectral Transmission Factor - Spectral Transmission Factor an instrument used to determine the relative intensity of various wavelengths in a spectrum of light.
Transmitted Spectral Emission - Transmitted Spectral Emission at a wave length λ.
Spectral Irradiation - Spectral Irradiation also known as spectral power density or spectral radiant flux, It describes the distribution of radiant power emitted by a source across the electromagnetic spectrum.

STEP 1: Convert Input(s) to Base Unit

Transmitted Spectral Emission: 3.89 --> No Conversion Required
Spectral Irradiation: 3.45 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

T_λ = J_λ'/G_λ --> 3.89/3.45

Evaluating ... ...

T_λ = 1.12753623188406

STEP 3: Convert Result to Output's Unit

1.12753623188406 --> No Conversion Required

FINAL ANSWER

1.12753623188406 ≈ 1.127536 <-- Spectral Transmission Factor

(Calculation completed in 00.020 seconds)

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Home » Engineering » Electrical » Utilization of Electrical Energy » Illumination » Methods of Lighting » Spectral Transmission Factor

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Created by Aman Dhussawat

GURU TEGH BAHADUR INSTITUTE OF TECHNOLOGY (GTBIT), NEW DELHI

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Verified by Parminder Singh

Chandigarh University (CU), Punjab

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< 6 Methods of Lighting Calculators

Intensity of Light Transmitted

Go Intensity of Transmitted Light = Intensity of Light Entering the Material*exp(-Absorption Coefficient*Path Length)

Number of Floodlighting Units

Go Number of Floodlighting Units = (Area to be Lighted*Illumination Intensity)/(0.7*Lumen Flux)

Spectral Transmission Factor

Go Spectral Transmission Factor = Transmitted Spectral Emission/Spectral Irradiation

Spectral Reflection Factor

Go Spectral Reflection Factor = Reflected Spectral Emission/Spectral Irradiation

Spectral Luminous Efficacy

Go Spectral Luminous Efficacy = Maximum Sensitivity*Photopic Efficiency Value

Luminance for Lambertian Surfaces

Go Luminance = Illumination Intensity/pi

< 16 Advanced Illumination Calculators

Beer-Lambert Law

Go Intensity of Transmitted Light = Intensity of Light Entering the Material*exp(-Absorption per Concentration Coefficient*Concentration of Absorption Material*Path Length)

Fresnel's Law of Reflection

Go Reflection Loss = (Refractive Index of Medium 2-Refractive Index of Medium 1)^2/(Refractive Index of Medium 2+Refractive Index of Medium 1)^2

Refracted Angle using Snell's Law

Go Refracted Angle = arcsinh((Refractive Index of Medium 1*sin(Incident Angle))/(Refractive Index of Medium 2))

Incident Angle using Snell's Law

Go Incident Angle = arcsinh((Refractive Index of Medium 2*sin(Refracted Angle))/(Refractive Index of Medium 1))

Intensity of Light Transmitted

Go Intensity of Transmitted Light = Intensity of Light Entering the Material*exp(-Absorption Coefficient*Path Length)

Illumination by Lambert Cosine Law

Go Illumination Intensity = (Luminous Intensity*cos(Illumination Angle))/(Length of Illumination^2)

Number of Floodlighting Units

Go Number of Floodlighting Units = (Area to be Lighted*Illumination Intensity)/(0.7*Lumen Flux)

Lambert's Cosine Law

Go Illuminance at Angle of Incidence = Illumination Intensity*cos(Incident Angle)

Spectral Transmission Factor

Go Spectral Transmission Factor = Transmitted Spectral Emission/Spectral Irradiation

Spectral Reflection Factor

Go Spectral Reflection Factor = Reflected Spectral Emission/Spectral Irradiation

Utilization Factor of Electrical Energy

Go Utilization Factor = Lumen Reaching Working Plane/Lumen Emitting from Source

Spectral Luminous Efficacy

Go Spectral Luminous Efficacy = Maximum Sensitivity*Photopic Efficiency Value

Inverse Square Law

Go Luminance = Intensity of Transmitted Light/Distance^2

Specific Consumption

Go Specific Consumption = (2*Input Power)/Candle Power

Luminance for Lambertian Surfaces

Go Luminance = Illumination Intensity/pi

Luminous Intensity

Go Luminous Intensity = Lumen/Solid Angle

Spectral Transmission Factor Formula

Spectral Transmission Factor = Transmitted Spectral Emission/Spectral Irradiation
T_λ = J_λ'/G_λ

What is meant by luminous transmission factor?

Luminous transmission factor (LTF) expresses the overall effect of a filter on a standard eye viewing a standard light source. The standard source currently used is determined by the Commission Internationale de l'Eclairage (CIE) as standard illuminant D65, which replicates a daylight source.

How to Calculate Spectral Transmission Factor?

Spectral Transmission Factor calculator uses Spectral Transmission Factor = Transmitted Spectral Emission/Spectral Irradiation to calculate the Spectral Transmission Factor, The Spectral Transmission Factor formula is defined as an instrument used to determine the relative intensity of various wavelengths in a spectrum of light. Spectral Transmission Factor is denoted by T_λ symbol.

How to calculate Spectral Transmission Factor using this online calculator? To use this online calculator for Spectral Transmission Factor, enter Transmitted Spectral Emission (J_λ') & Spectral Irradiation (G_λ) and hit the calculate button. Here is how the Spectral Transmission Factor calculation can be explained with given input values -> 1.127536 = 3.89/3.45.

FAQ

What is Spectral Transmission Factor?

The Spectral Transmission Factor formula is defined as an instrument used to determine the relative intensity of various wavelengths in a spectrum of light and is represented as T_λ = J_λ'/G_λ or Spectral Transmission Factor = Transmitted Spectral Emission/Spectral Irradiation. Transmitted Spectral Emission at a wave length λ & Spectral Irradiation also known as spectral power density or spectral radiant flux, It describes the distribution of radiant power emitted by a source across the electromagnetic spectrum.

How to calculate Spectral Transmission Factor?

The Spectral Transmission Factor formula is defined as an instrument used to determine the relative intensity of various wavelengths in a spectrum of light is calculated using Spectral Transmission Factor = Transmitted Spectral Emission/Spectral Irradiation. To calculate Spectral Transmission Factor, you need Transmitted Spectral Emission (J_λ') & Spectral Irradiation (G_λ). With our tool, you need to enter the respective value for Transmitted Spectral Emission & Spectral Irradiation and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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